The knee-high boot can look fantastic with so many clothes in your wardrobe. From pencil jeans to tailored skirts, there is something about the look of a knee-high leather boot that instantly adds a metropolitan look to just about any outfit. However, not everything looks peachy with this style of boot; avoid tucking this footwear into baggy jeans and never pair them with shorts or too-short miniskirts.

Beyond these basic rules, the sky is the limit for wearing knee-high boots throughout the cold weather season. These five fabulous looks for knee-high boots will help you hit the office or the mall in high style this fall.

ClassicConsider a knee-high leather boot with an A-line skirt that hits mid-thigh or a straight skirt that falls just above the knee. This classic look is perfect for the office or running errands around town, depending on the skirt you choose. Conservative wool is the ideal choice for the chic executive, and corduroy or denim will provide casual style for your weekend wear. If you can brave the cold, go ahead and leave the tights at home, but if you choose to don hosiery, make sure it coordinates to your ensemble.

If you are petite, go with a monochromatic look, like a black skirt, black tights and boots that will give the illusion of height. This look requires that the tops of your boots fit snugly to your calf. If your calves run on the extra skinny or wide side, choose a stretch boot that will provide a better fit. The Cole Hahn Nanette tall boot is a good style for a basic stretch boot.

Knee-high boots also work well with long, flowing Capri pants or gauchos.

Make sure the cropped pants are on the dressier side, and the boots are a basic style. You can also pair your knee-high boot with long, flowing skirts, or straight skirts that hit mid-calf or lower. While this isn't considered one of the trendier looks right now, it has survived the test of time because many women simply feel good wearing this style.

SexyIf you want a sexy knee-high boot, think one word: stiletto. A bit of panache doesn't hurt either, like an oversized buckle or some bling with rhinestone accents or metallic embellishments. And while black may be the automatic choice for boots that get noticed, a little color can go a long way too. The BCBGirls Chill boot at Nordstrom.com offers a nice high heel and some patent accents for a sexy touch.

The BP. Nary boot is another fun choice, with a 3.5-inch heel and a leather wrap that drapes around the ankle. Lace-up boots offer sex appeal of the Victorian kind and offer the perfect romantic accents to flowing skirts or gauchos. Go-go boots never seem to go away completely, and this year they are back in many hot shades. The Pleaser Vanity-2010 boots in fire-engine red patent offers a look that sizzles, but bright white can also get the sirens blaring.

FunkyIf you like to flaunt your style loud and clear, the knee-high platform boot will do the job.

These designs can swing from gothic to outrageous with colors and patterns you wouldn't see in a more conservative style. The black tiger-print knee-high boots in stretch suede by Donald J. Pliner are the perfect example. For another unique pair by the same designer, the Gail boot comes in leopard print leather. You can also opt for patent leather for plenty of shine, and don't shy away from colors like lime green and hot pink if you can take the heat.

Platform shoes and boots have a thicker outer sole that will lift up the entire foot, and will generally sport a pretty high heel as well. These are perfect for the petite woman who wants to add a bit of height to her stature with plenty of finesse.

OutdoorsSuede boots are perfect for the outdoor look and the cream of the crop in suede can be found by the Minnetonka Moccasin Company. They also produce a fabulous three-layer fringe style that can be found in black or brown at the same website. These boots are as comfortable as they are stylish with a low heel and plenty of soft suede around your feet and legs.

Another fab look for the great outdoors is the riding boot, which usually comes with a low heel and buckle around the ankle. These boots are generally crafted of the highest quality leather that resonates with class and elegance. These knee-high leather boots look fantastic with skinny jeans tucked inside or paired with a long tweed skirt. The Etienne Aigner Cailyn is a perfect example of the classic riding boot that looks just as sharp in leather or suede.

CasualSometimes the best knee-high boot is the one that has been sitting in your closet for a while, broken in and comfortable enough to wear all day long. Maybe you don't have a pair of those hanging around, but you can get the same look and feel with some of the new styles this season. The Anne Klein Kelly boot is the perfect basic black knee-high boot to dress up your bootcut jeans. For a knee-high boot designed for tucking skinny jeans inside, go for a slightly slouchy style with a bit of heel. Black or brown will work equally well, or go for a pair of red or blue for extra flair.

Celebrities like Sienna Miller and Kate Moss are sporting knee-high flat boots this year, with everything from skirts and dresses to leggings and cigarette jeans.

You can also toss on a pair of knee-high flat boots with your favorite shift dress or skirt in place of the standard ballet flat for a styling look that spans the season. For a great flat boot that is made to last, check out the Frye Annie double zip boot.

It's hard to think about cold weather when summer is in full swing, but cooler temperatures are coming. Get ready to face fall with a selection of knee-high boots that will kick off the season in style. Whether you are looking for a sexy, funky or classic look, you can find the right boot to match your taste. Buy them in basic black or go wild with an unexpected splash of color. Wear them flat or choose the highest heel you can handle. Wear them with your jeans, skirts and everything in between. With warmth and style in their corner, knee-high boots are a must have when the temperatures cool down.

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